Bag machine



y 1929- A; BECKMANN BAG MACHINE I Filed Dec Patented May 28 1929. I

UNITED sra'res' 1,714,585 PATENT OFFICE.

nueusr BEGK AN'N, or 3mm mwn, PENNSYLVANIA, ASSIGNOR 'ro' 'rnonms u.ROYAL & 00., or PHILADELPHIA, PENNSYLVANIA, nconroiwrron or PENN-i sYLvAA.

BAG mcnmn Application filed December 31, 1828. Serial No. 683,818.

My invention relates to machines of the type in which bellows-foldedtubes are formed from a web of paper,- which tubes are subsequentlysevered into bag blanks and then presented to bottom formin mechanism,all of such operations being performed automatically upon a continuousweb (or webs) of paper fedto the machine from a suitable sup- One ob ectof my invention 15 to provide bag machines of this character with meanswhereby the paste can be uniformly applied to the edge of the websubsequently formed into the bellows-folded tube; In order to effectthis result, I preferablygear the paste roll to one of the idler rollsover which the web of paper passes; the movement of which idler roll iseflected by the movement of the Web, and by gearing said paste roll toan idler rollthat is driven by the paper so that said paste roll ispositively moved, there is an assurance that a line of paste will beapplied to the moving web of paper in the proper manner.

A further object of'my invention is to provide means for spreading theline of paste so applied into a thinner film, so as to insure a smoothseam which may be closed by the:

' application of plain surfaced rolls which may.

also serve as the draft rolls for efi'ecting movement of thebellows-folded tube.

A further object of my invention is to prois to provide a special draftroll for eifecting movement of the bellows-folded tube to the pointwhere the latter is severed into blanks which are then passed to bottomforming mechanism to complete the formation of the ba These and otherfeatures of my invention are more fully described hereinafter;referencebein ings, in w 'ch:

Figure 1, is a plan view, more or less diagrammatic, of suiiicient ofthe mechanism of a paper bag machine to show the paste-applying meansand the adjacent elements for forming a bellows-folded tube from acontinuous web of paper, to illustrate my invention.

Fig. 2, is a side elevation, more or less diahad to the accompanyingdrawgrammatic, of the mechanism shown in Fi 1. p Fig. 3, is a view in,elevation of the drawrolls which I may employ with my improved I bagmachine. 4 Fig. 4, is a plan view of a portion of the web, showing thelines of fold and indicating by dotted lines the portion-employed toform a single bag blank',and

Flg. 5, is a perspective view. of the end of a bellows-folded bag blankwhich is subsequently formed into the bottom of the bag.

Referring to the drawings, 1 indicates a portion of the frame-of themachine, which may support a roll of paper 2, (and in some instancesa'second roll, indicated by dotted lines at 2). A paste receptacle isindicated at 3, and guide rollers 4, 5 and 6 may be mounted adjacentthepaste receptacle for the proper direction of the paper. 7 The machineis ofthe type employing the usual former plates 9 and 10, supported bythe frame in any suitable number, with guide fingers 11 located near thereceiving end of the former plates; such guide fingers serving toproduce the desired bellows-fold at the edges of the tube being formed,and from which the bag blanks are subsequently out. w

- These parts are substantially similar to parts of bag.formingmechanism already in use and in the operation of my improvedmachine,-the'web of paper is conductedto the former plates in such a waythat the seam to be formed is not disposed at the middle of the upperformer plate, but is arranged along one side thereof, preferably at thatside of the paperroll opposite the point at which the paste is applie iIn order that the web may be secured together to form a tube,one edge ofthe same has a line (or lines) of paste applied to the same and for thispurpose I may provide a grooved paste roll 14, disposed within the pastereceptacle 3; said roll being carried by a shaft 15, suitably journalcdin said paste receptacle or otherwise supported. The paste-applying rollis preferably adjustably mounted on said shaft 15, and is arrangedto-engage one edge of the web of paper as it passes over the guide roll6, as clearly illus-..

trated in Fig. 1.

In order that paste can be applied uniform 1y to the surface of the webof paper passing over said roll 6, avoiding any possibility of the pasteroll halting or not moving with said guide roll, I provide the shaft ofthe latter with a pinion 16, and the shaft 15 carrying the paste rol1'14isprovided with a meshing spur wheel 17, secured to the outer end of thepaste roll shaft so that movement of said guide roll -6 induced by thepassage of the web of paper over the same, will effect positive movementof the shaft 15 carrying the paste roll and uniform contact of the samewith the web of paper will be assured. The pinion 15 is preferably abroad-faced member so as to permit a range of adjustment for the to andabove the former plates for the purpose of making these slits. As onlyone face of the tube isslit, only one set of knives are employed.

'1 The bellows-folded tube is carried forward on the former-platesandpassed to'the well known severing and bottom forming mechanism (notshown) by upper draft rolls 20 V For this purpose I may provide aspreading,

finger comprising a fiat plate, substantially and 21, whichcooperatewith a lower roll 22, and the shafts 20*"- and 22 carrying these rollsmaybe geared together. I

In order that the several draftgrolls may apply their pressure evenly tothe seam and avoid uneven draft due to any unevenness in the line(orlines). of the paste, I provide -means for spreading the line(orlinesi); of

paste applied to the web by the paste roll.

flexible, indicated at 25, such plate havingla y support 26 carried by astem 27, Suite mounted upon the frame 1. This stem may carryatorsion'spring 28, one end of which is attached-to a fixed part ofthemountwhile the o posite end is connected with the sprea er element sothatthe operativeend" of the latter may be lightly held in contact rwith the web over the line (or lines) of paste ap lied thereto.

l e action of this spreader to produce a relatively thin film of thepaste applied and when such portion of the web reaches the 3 ,draftrolls, 20 and 22, they will ress it down upon the edgeofthe paper wwhich has been brought into the propergelativc 'jtionby the formerplates. The lower'mft 60,

roll is 'groov f at 2'2 andthe upper-101120 engaging the seam partiallyI overlies this groove so that should any portion of the paste tend toincrease the thickness'of the seam it may be relieve d,spreadinglaterallyinto such groove.

In the, operation of my improved machine, the web of paper after beingformed into a bellows-folded tube, in which a side seam is employed tocomplete the tubular formation,

receives slits on one side only, indicated at A, and when such bag isintroduced to the bottom forming mechanism, the portion a, lying betweensaid slits A, is properly manipulated and is the last secured in placeto form the bottom of the bag by the applicaa web of paper, usually of aglazed character and much thinner, to form a lining; the two webspassingto the tube-forming mechanism as a unit and the operation upon suchduplex web resulting'in the formation of what are known as lined bags.For this purpose, therefore, I have illustrated the paste receptacle asprovided with a pair of paste-applying rolls, and it will be understoodthat the roll indicated at 14 may be employed to apply a line of pasteto the Web of paper forming the outer portion of the ba while the rollindicated at 14 may be emp oyed to apply a line of paste to the web ofpaper employed for the lining. The paste for the outer web or layer ofpaper is preferably applied by a grooved roll as indicated at 14, makingtwo fine lines of pasteupon the paper, and in the present instance it isthese lines that are engaged by the spreader to provide the wider andthinner film of paste whereby the side seam may he formed which is thepart engaged by the draft rolls 20 and 22. It will be sunderstood, ofcourse, that the spreader may be employed with each line of pasteapplied.

It will be understood, of course, that the slits A may be formed ineither face of the bellows-folded blank adjacent to the point where suchblank is severed from the tube, and that slitting knives, such as thoseindicated at 19, for instance, may be arranged to operate from a pointbelow the former plate 10 instead of above the same.

I claim:

1. The combination with a pastereceptacle, a guide-roll disposedadjacent thereto and means for conducting a web of paper over said guideroll, of rotating paste-applying means mounted in said paste receptacleand adjacent'toone edge of the web of paper and arrangedto cdntacttherewith for the-purpose of applying--a narrow line of paste to theouter surface thereof, means for dr ving said paste-applying means andthe guide roll whereb the movement of one of said members be positivelytransmitted to the ptheriand the paper web moved in unison with thepaste-applying means, and an overhanging member atone end of theguide-roll and'under slight tension posiinto a slightly wider film.

2. The combinationwith a paste receptacle, 7

a guide. roll disposed adjacent thereto and means for conducting a webof paper over said guide roll, of a roll mounted in said-pastereceptacle and arranged tocontactwith said web of paper; said rollhaving a contacting surface adapted to applypar'alleling lines'of pasteto the outer surface of said web of paper, means for driving thepaste-applying roll and. the paper in unison, and means d1s-.

posed at one end of the guide-roll and overhanging the paperweb and incontact therewith for spreading into a continuous connected fil-m on theweb of paperthe lines of paste applied thereto by the roll in the pastereceptacle;

The combination of a paste receptacle, a pair of narrow paste rollsdisposed in said receptacle side by side; one of said rolls beingarranged to apply two lines'of paste .to theouter surface of a web ofpaper 'means including a guide roll for conducting said web of paperpast the paste-applying rolls, and a spring-pressed finger positionedabove and adjacent one end of the guide roll and adapted to-contact withthe surface of the paper web for spreading into acontinuous-connectedfilm the parallel lines of paste applied by one of said paste rolls.

Inwitne ss whereof I have signed this specification. v AUGUST BEGKMANN.

